Macrosiphum rosae
In 3 days ~10% in a week ~20%
Macrosiphum rosae, the rose aphid, is a species of sap-sucking aphids in the subfamily Aphidinae. They have a world-wide distribution and infest rosebushes as the main host in spring and early summer, congregating on the tips of shoots and around new buds. Later in the summer, winged forms move to other rose bushes, or to a limited number of secondary hosts, before returning to rosebushes to lay eggs in the autumn.
Wingless adults have a spindle-shaped body and are between 1.7 and 3.6 mm (0.07 and 0.14 in) long, slender, varying in colour from green to pink and reddish-brown. The antennae and legs are relatively long, and the cauda (tail-like protrusion) is pale. The siphunculi (pair of small backward-pointing tubes on the abdomen) are long, tapered and black, which distinguishes this aphid from Metopolophium dirhodum, the rose-grain aphid, which has pale siphunculi. Winged individuals are between 2.2 and 3.4 mm (0.09 and 0.13 in) in length, varying from green to pinkish-brown, and having distinctive black lateral markings.
This aphid mainly overwinters as eggs on roses, but in mild winters, some adults may survive until spring. The eggs hatch in... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Belgrade | 🇷🇸 Serbia | |
| 2 | Berlin | 🇩🇪 Germany | |
| 3 | Paris | 🇫🇷 France | |
| 4 | Portland | 🇺🇸 United States | |
| 5 | Madrid | 🇪🇸 Spain | |
| 6 | Salt Lake City | 🇺🇸 United States | |
| 7 | Melbourne | 🇦🇺 Australia | |
| 8 | Vienna | 🇦🇹 Austria | |
| 9 | Los Angeles | 🇺🇸 United States | |
| 10 | London | 🇬🇧 United Kingdom |
Rare
Under 5% of wildlife watchers report a Rose Aphid sighting in Portland on a given day, based on 18 verified sightings from GBIF citizen-science data. It is the 242nd most-seen of the 507 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
May and June
In those months about 10% of wildlife watchers report a Rose Aphid in Portland on a given day, against under 5% in July to April, the lowest months. Those are among Portland's driest months, with about 65 mm of rain a month against 250 mm in December.
4th of 15
Of the 15 cities where we can rate Rose Aphid sightings, Portland ranks 4th at under 5%. The best odds are in Belgrade (Serbia, about 10%), Berlin (Germany, under 5%) and Paris (France, under 5%).
GBIF citizen-science records
It is estimated from how often the Rose Aphid is recorded against all the insects logged in Portland (18 verified sightings), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
